Function daysBetween

codebase/sources/dhtmlxscheduler.es.js:15805–15810

(date1, date2)

  return isDate(value) && !isNaN(value.getTime());
};
var daysBetween = function(date1, date2) {
  var date1ms = date1.getTime();
  var date2ms = date2.getTime();
  var differencems = date1ms - date2ms;
  return Math.round(differencems / ONE_DAY);
};
var toOrdinal = function(date) {
  return daysBetween(date, ORDINAL_BASE);
};